31042422 has 12 divisors (see below), whose sum is σ = 67258620. Its totient is φ = 10347468.

The previous prime is 31042421. The next prime is 31042457. The reversal of 31042422 is 22424013.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1724579 = 31042422 / (3 + 1 + 0 + 4 + 2 + 4 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 31042395 and 31042404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31042421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 862272 + ... + 862307.

It is an arithmetic number, because the mean of its divisors is an integer number (5604885).

Almost surely, 2^31042422 is an apocalyptic number.

31042422 is an abundant number, since it is smaller than the sum of its proper divisors (36216198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31042422 is a wasteful number, since it uses less digits than its factorization.

31042422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724587 (or 1724584 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 31042422 is about 5571.5726684662. The cubic root of 31042422 is about 314.2812941724.

Adding to 31042422 its reverse (22424013), we get a palindrome (53466435).

The spelling of 31042422 in words is "thirty-one million, forty-two thousand, four hundred twenty-two".